123240234420 has 36 divisors (see below), whose sum is σ = 373828711620. Its totient is φ = 32864062464.

The previous prime is 123240234391. The next prime is 123240234431. The reversal of 123240234420 is 24432042321.

123240234420 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 4 + 0 + 234 + 420 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 91525611024 + 31714623396 = 302532^2 + 178086^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342333805 + ... + 342334164.

Almost surely, 2^123240234420 is an apocalyptic number.

123240234420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123240234420 is an abundant number, since it is smaller than the sum of its proper divisors (250588477200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123240234420 is a wasteful number, since it uses less digits than its factorization.

123240234420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684667984 (or 684667979 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 123240234420 its reverse (24432042321), we get a palindrome (147672276741).

The spelling of 123240234420 in words is "one hundred twenty-three billion, two hundred forty million, two hundred thirty-four thousand, four hundred twenty".